same as why people are fighting overseas, the best way we can get information is by information and intel that came from everyday citizens about things that were about to happen or changes in situations. >> and foiled plots, it's been american citizens on planes taking down terrorists or would-be terrorists. >> or a guy on a times square, who was seen by a person in times square. >> why they do this and to what degree it's important. what were they trying to accomplish? maybe we'll find out more. they had no getaway plan. this was not like an al qaeda operation. which would involve suicide bombers, aimed at high-priority targets and there's a statement that they're trying to make. this is still a lot different from those type of attacks. >> and because it's different and also there are two, there are two suspects here. one is deceased. and one seems to have to have have been based on the evidence we've seen so far, been more radical in terms of having more of a jihadist mentality. the 19-year-old, the one who is still alive, dzhokhar tsarnaev, seems to have been less, i think ideologic id